Construction
| Tue 21 Mar 2023
Beijing, March 21 -- Yunnan Construction & Invest Holding Group has sought patent for preparation method of polycarboxylic acid admixture for machine-made sand high-strength concrete. This invention was developed by Ye Honghong, Ma Zhenglin, Li Guanyong, Fan Xingbo, Chen Zhixuan, Wang Wei, Luo Shunjiang, Wei Jiaxu, Hu Jun, Lee B..